After nearly a week walking my ass off in reasonable early-spring weather, I arrived back in Chicago last night to -11°C, which dropped to -15°C for my commute this morning. It is strangely not comforting that it has been this cold this late on only 12 days since 1871. Or that it's going to be even colder Wednesday and Thursday.

Will it warm up? Eventually. But the National Climate Prediction Center forecasts below-average temperatures for the next couple of weeks.

It was really nice to be able to walk 10-14 km every day for a week. Maybe sometime in June I'll be able to do that again.